Telltale device for an electrical coincidental door locking system



J. W. LAKlN Jan. 9, 1940.

TELLTALE DEVICE FOR AN ELECTRICAL COINCIDENTAL DOOR LOCKING SYSTEM Filed Oct. 25, 1937 Sheets-Sheet l INVENTOR. John W. Lakin JZ Q A, /ZM I ATTORN Jim 1940- J. w. LAKIN 2,186,546

TELLTALE DEVICE FDR AN ELECTRICAL COINCIDENTAL DOCR LOCKING SYSTEM I Filed oct. '25, 1937 2 Sheets-Sheet 2 Fig. (5.

I INVENTQR. John W. L'akl n a :2 g g.

' ATTO BY. 5

Patented 9, 1940 TBLLTALE nsvlca roa AN ELECTRICAL COINCIDENTAL DOOR LOCKING SYSTEM John W.

stedt Lian Lakin, Detroit, Mlchga'ssignor to Ternnfactnring Company, Detroit, lillcln, 1

annotation of Michigan Applioation October 25,1937, Serial No. 170,797

' 2 Claims. (CL IO-264) This invention relates to a'telltale device for an electrical coincidental door locking system.

This invention contemplates an electrical coincidental door locking system for an automo- I tive vehicle with a visible telltale arrangement for indicating to the operator when all of the locks in the system have worked as well as when i any one or more of the locks has failed to work. In particular it is the object of the invention to lo provide such an electrical coincidental door locking system which requires only a momentary flow of electrical current to operate the same and is therefore economical in operation. f

In the drawings:

Fig. 1 is-an elevation of the master door lock preferably for the right front curb door.

Fig. 2 is an elevation of one of the locks used on the remaining doors of the vehicle body. i Fig. 3 is a schematic showing of the electrical coincidental door locking system and telltale arrangement.

The coincidental electric door locking system and telltale arrangement. which is the subject of SI this invention can be applied to any of the wellknown types of door locks but for descriptive purposes it isfshown applied to a lock shown, described and claimed in the Andersen et al. Patent 2,039,873. $0 This lock comprises a frame i upon which is slidably mounteda reciprocating latch bolt 2..

auxiliary far described is identical with that snown in the above-mentioned Andersen et al. patent.

The lever I can be operated from the inside" of the car to 'set and release the connector 8 by means of a .vertically slidable plate I: slids ably mounted at its upper endin the bracket i4 flx, ed to the latch frame l. 1he lower end Ii of the slide plate "has a sliding fit in an opening in the horizontal flange ll of the lever 8. A coil spring I1 is mounted over the end it of the slide plate and between the horizontal flange II and the shoulder ll on the slide plate I 2. The slide plate I! can be raised and lowered from the inside of the body by a small lever ll. When the slide plate" is slid downwardly the driving force is transmitted from the slide is through the coil spring IT. to the lever to swing the same downwardly and release the connector 6. As the lever 9 in the master lock moves The latch bolt 2 carries the bolt spring! which acts against a lever 4 plvotally mounted as at 5 on the frame i to project the bolt. A connector 6 between the outside rollback I and the bolt is pivotally mounted as at 8 on the lever.

4. The pivoted connector 6 is arranged to be swung into set and released positions by means of a lever 9. when the connector 0 is set, as

shown in the full lines of Fig. 1, the outside rollback is operatively connected with the bolt 2 and rotation of the. outside rollback will retract the bolt. When the connector I is released. 8,

shown in the dotted lines of Fig. l, the outside rollback is disconnected from the bolt and rotation of the outside rollback is ineifective to .retract the bolt.

The lever 9 can be swung to either set or releasethe' connector 0 from the outside of the vehicle body by means of a bolt I. slidablymounted in the outside door handle spindle ii and operated by the eccentric piri'l2 on the end ofa key operated cylinder lock shaft. The construc- 5 tion and the modeof operation of the lock thus "contact with" the flange 24 of the lever 25. This downwardly the over center spring- 84 which 20 is connected at one end to the latch frame I and at the other end to the lever 9, swings over center and assists in swinging the lever 9 downwardly. This locks the front curb door lock, that is, releases the connector I and makes the outside rollback ineifective'to .retractthe bolt 2.

A spring lunger or push button type of switch generally designated 20 is carried" by the plate 2| which is flxed to the latch frame I. The

push-button switch 20 comprises the plunger 30 22 which is normally held in projected podtion (full lines, Fig. 1) by means of a sprin and in such case the switch 2| is open. When the plunger 22 is depressed against the force oi. the usual spring, the switch contacts come together'and the switch is closed. After the front curb door lock is locked from the inside, as above described, the slide is is slid downwardly still further which compresses spring l1 and brings the arm 23 into swings the lever 25 downwardly and depresses the spring plunger 22 to close the switch 20. As soon as the slide- I3 is released the spring-i1 again projects it upwardly to release the plunger 22 which opens the switch, 20. Y

- The switch '22 can also be'closed from the outside of the door by rotating the rollback I in bolt retracting direction when the connector 6 is released. This causes the connector 6 as it travels to the left, Fig. 1, to-enga'ge the lug 28 on the lever 25 which rotates the lever 2i coun terclockwise to in turn depress the plunger 22 which closes the switch contacts. As soon as the outside door handle or rollback 'l is released thebolt spring 3 turns the rollback l clockwise as reference numerals. However,this secondary lock- Eli to the full line position and slides the connector 6 to the right which releases the pressure on the spring plunger 22 and permits the switch 28 to again open.

In Fig. 2 there is shown the secondary lock which is used on the other three doors of the vehicle body. This lock is similar to the master lock and the corresponding parts bear the same is arranged to be manually locked and unlocked from inside the door and electrically locked whenever the master lock, shown in Fig. l, is operated as above described to close the switch 28.

For manual locking of the secondary lock this lock is provided with a slide plate 38 operated by the usual snap-tight lever i 9 on the inside of the door. The plate 38 is slidably guided on the latch frame 8 also by a bracket M and has its lower end portion 3! slidably mounted in an.

opening in the flange it of the lever 9. The plate 38 in the secondary lock and the plate 83 in the primary lock are each provided with an. outwardly turned lug 32 which engages the flange it to raise the lever 9 as the plates is and 38 are slid upwardly. In the secondary lock the spring 6! whenever the connector 8 is set is compressed. However, the lever a is held in raised position by a pivoted detent 33 having 2:. lug 38 which-engages the end 35 of the lever 9. The slide plate '38 is provided with a cam portion 5:35 which engages an inclined portion 31 of the detent lever 33. When the plate 38 is 'slid downwardly, it swings the detent 33 counterclockwise, releasing the lug 3% from the end 35 of the lever ii. This permits the spring ti which is normally under tension to swing the lever 8 downwardly thus releasing the connector 5. The coil spring it, one end of which is secured to the latch frame i as at 52 and the other end to the lever 5 as at $8, is normally uncler tension both when the lever 5 is in raised position and in lowered position and tends at all times to swing the lever ii downwardly.

The detent 33 can alsobe released by means of the electromagnet 33. When the magnet 38 is energized, the detent lever 33 serves as an armature which is drawn to the magnet 38 and the lug 3G is withdrawn from the end 35 of the lever 9 which also permits the spring 8! to release the connector 8.

The wiring diagram for the coincidental locking system is shown in Fig. 3. The switch 28 on the master lock is connected to the battery 48 by the wire 6 l. The switch 28'is also connected to the electromagnets 38 by means of the wires 42, 33 and M as shown. Thus it will be seen that the several magnets 38 are connected in parallel.

To notify the operator when all of the doors are locked or failure of any door to lock, there is provided a telltale preferably in the form of an electric light bulb 58 which is connected by wire 5! with the wire 43 of the circuit for the electro'- magnets. The telltale lamp 58 is connected in series with switches generally designated on each of the three secondary locks by wires 52',

53and 54. The switches 55 are all the same andv comprise a pair of contacts 56 and 51 which are insulated from each other and from the frame 58 which is mounted on the lock frame I and supwires 52, 53 and 55 and-finally grounded as at 88.

It is evident fromthe above that in each lock the electromagnet 38, armature detent 32 and the switch 55 constitutes a relay whereby the flow of current through the telltale circuit 58, 52, 53, 54 is controlled. j

Whenever the plunger 22 is depressed, either by the finger 23 on the slide I3 or by the leftward movement of the connector 6 as it swings the lever 25 coimterclockwise, Fig. 1, this closes the switch 28 to energize the electromagnets 38 and release the connectors 6. If all of the magnets 38 are energized and all of the detent armatures 38 attracted to the magnets 38 so that the contacts 59 bridge the several pairs of contacts 58 and 51, then current will flow frdjn the battery Ml through the telltale lamp 58 and the several the spring 59 will expand and release the connector 5. If in any secondary lock the detent armature 33 is not disengaged to permit releasing of the connector 5 for such lock, then the contacts 56 and 57 of-such secondary lock will not be bridged. No current will flow through the series circuit comprising the lamp 558 and switches In such case the lamp 58 will not glow and the operator will be warned that one of the locks has not been locked. In such case the operator can manually release the connector 5 for the lock which failed to lock.

It is evident from the above description that current flows through this telltale lamp only mementarily and simultaneously with the flow of current through the electromagnets 38. Thus very little current is required for the operation oi this telltale arrangement and no substantial burden is placed upon the automobile battery 48.

if for any reason the car driver desires to check.

from without the car to satisfy himself that all the doors are locked, he can very easily do this by turning the curb door outside handle downwardly as described in the above-mentioned Andersen,

et/al. patent. This rotates the outside rollback l.

This, as above-described, energizes all of the.

magnets 38'and closes the series switches 55 which again causes the lamp 58 to glow. The glowing oflamp 58 indicates that all the locks are locked.

I claim: 1.' An electricalcoincidental lockin system for the doors of an automotive vehicle body compris-' ing a primary lock and a secondary lock, each of said locks having a retractable latch bolt and an outside retractor for said latch bolt, said secondary lock having means actuatable to render its retractor ineffective to retract its=bolt, and said primary lock having a shiftable connector between said retractor and said latch bolt and whichconnector is shiftable by said retractor when set as well as released, said connector when set adapted to connect the outside retractor to the latchbolt and thereby render the retractor effective to retract the latch bolt, said connectorwhen released from the latch bolt rendering the outside retractor ineffective to retract the bolt, a,

source 01 electric current, an electrically operated telltale means for indicating when all said retractors are ineffective to retract said bolts, a switch for each secondary lock, .said secondary lock switches in series circuit with each other and said telltale means, electromagnets for controlling said means on said secondary locks to render each of said secondary lock retractors ineffective to retract its respective bolt and for controlling said telltale switches, said electromagnets being in circuit with said source of electrical current, a switch for controlling the flow of current through the said circuit between the electromagnets and the source of electricity, said switch adapted to be actuated by the connector of said primary lock only when released and when the outside retractor shifts the said released connector whereby the telltale switches are closed and the telltale circuit completed only when current flows through said electromagnetic circuit and the electromagnets function to control said means to render said retractors ineffective to-retract the bolts.

2. An electrical coincidental locldng system' for the doors of an automotive vehicle body comprising a primary lock and a secondary lock, each of said locks having a retractable latch bolt and a rotatable outside rollback for retractingsaid latch 7 bolt, said secondary lock having means actuatable to render its rollback inefiective to retract its bolt, said primary lock having a shittable connector between said rollback and said latch bolt.

the said connector being shiftable by said rollback when set as well as released, said connector when set adapted to connect the outside rollback to the latch bolt and thereby render the outside rollback efiective to shift the connector and retract the latch bolt, said connector when released from the latch bolt rendering the outside rollback ineffective to retract the bolt, a source of electric current, an electrically operated telltale means for indicating when all said outside rollbacks are inefiective to retract said bolts, a switch for each secondary lock in series circuit with each other and said telltale means, electromagnets for controlling said means on said secondary lock to render each of said secondary lock outside rollbacks ineffective to retract its respective bolt and e for controlling said telltale switches, said electromagnets being in circuit with said source of electrical' current, a switch for controlling the flow of current throughthe said circuit between the electromagnets and the source of electricity, said switch adapted to be actuated by the connector of said primary lock only when released and when the outside rollback is turned to shift the said released connector whereby the telltale switches are closed and the telltale circuit completed only when current flows through said electromagnetic circuit and the electromagnets function to control said means to render said retractors ineflective to retract the bolts.

' JOHN W. LAKIN. 

